bin/artifact_huggingface_download.sh

#!/bin/bash
#
# ComfyUI Model Downloader - A Beautiful CLI Tool
# Downloads AI models from HuggingFace and creates symlinks to ComfyUI directories
#
# Usage: ./artifact_comfyui_download.sh [COMMAND] [options]
#
# Commands: download, link, both (default)
#

set -euo pipefail

# ============================================================================
# COLOR PALETTE - Beautiful Terminal Colors
# ============================================================================

# Reset
RESET='\033[0m'

# Foreground Colors
BLACK='\033[0;30m'
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
BLUE='\033[0;34m'
MAGENTA='\033[0;35m'
CYAN='\033[0;36m'
WHITE='\033[0;37m'

# Bold
BOLD_BLACK='\033[1;30m'
BOLD_RED='\033[1;31m'
BOLD_GREEN='\033[1;32m'
BOLD_YELLOW='\033[1;33m'
BOLD_BLUE='\033[1;34m'
BOLD_MAGENTA='\033[1;35m'
BOLD_CYAN='\033[1;36m'
BOLD_WHITE='\033[1;37m'

# Background Colors
BG_BLACK='\033[40m'
BG_RED='\033[41m'
BG_GREEN='\033[42m'
BG_YELLOW='\033[43m'
BG_BLUE='\033[44m'
BG_MAGENTA='\033[45m'
BG_CYAN='\033[46m'
BG_WHITE='\033[47m'

# Styles
DIM='\033[2m'
ITALIC='\033[3m'
UNDERLINE='\033[4m'
BLINK='\033[5m'
REVERSE='\033[7m'

# ============================================================================
# UNICODE CHARACTERS - Make it Pretty
# ============================================================================

CHECK_MARK="✓"
CROSS_MARK="✗"
ROCKET="🚀"
PACKAGE="📦"
DOWNLOAD="⬇️"
SPARKLES="✨"
FIRE="🔥"
CLOCK="⏱️"
FOLDER="📁"
LINK="🔗"
STAR="⭐"
WARNING="⚠️"
INFO="ℹ️"
ARROW_RIGHT="→"
DOUBLE_ARROW="»"
BOX_LIGHT="─"
BOX_HEAVY="━"
BOX_DOUBLE="═"

# ============================================================================
# CONFIGURATION
# ============================================================================

# Script directory
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"

# Default configuration file path
# Try multiple possible locations
if [[ -f "${HOME}/Projects/runpod/comfyui_models.yaml" ]]; then
    CONFIG_FILE="${HOME}/Projects/runpod/comfyui_models.yaml"
elif [[ -f "${PROJECT_ROOT}/comfyui_models.yaml" ]]; then
    CONFIG_FILE="${PROJECT_ROOT}/comfyui_models.yaml"
elif [[ -f "${SCRIPT_DIR}/comfyui_models.yaml" ]]; then
    CONFIG_FILE="${SCRIPT_DIR}/comfyui_models.yaml"
else
    CONFIG_FILE=""  # No config file by default
fi

# Default cache directory - detect RunPod or use HuggingFace default
if [[ -d "/workspace" ]]; then
    # RunPod environment
    CACHE_DIR="${CACHE_DIR:-/workspace/huggingface_cache}"
    COMFYUI_DIR="${COMFYUI_DIR:-/workspace/ComfyUI/models}"
else
    # Local environment
    CACHE_DIR="${CACHE_DIR:-${HOME}/.cache/huggingface}"
    COMFYUI_DIR="${COMFYUI_DIR:-${HOME}/ComfyUI/models}"
fi

# Default command
COMMAND="both"

# HuggingFace token from environment or .env file
# Initialize HF_TOKEN if not set
HF_TOKEN="${HF_TOKEN:-}"

# Try multiple locations for .env file
if [[ -z "${HF_TOKEN}" ]] && [[ -f "${PROJECT_ROOT}/ai/.env" ]]; then
    HF_TOKEN=$(grep ^HF_TOKEN "${PROJECT_ROOT}/ai/.env" | cut -d'=' -f2- | tr -d '"' | tr -d "'" || true)
fi
if [[ -z "${HF_TOKEN}" ]] && [[ -f "${PROJECT_ROOT}/.env" ]]; then
    HF_TOKEN=$(grep ^HF_TOKEN "${PROJECT_ROOT}/.env" | cut -d'=' -f2- | tr -d '"' | tr -d "'" || true)
fi
if [[ -z "${HF_TOKEN}" ]] && [[ -f "/workspace/ai/.env" ]]; then
    HF_TOKEN=$(grep ^HF_TOKEN "/workspace/ai/.env" | cut -d'=' -f2- | tr -d '"' | tr -d "'" || true)
fi

# ============================================================================
# UTILITY FUNCTIONS - The Magic Happens Here
# ============================================================================

# Print functions with beautiful formatting
print_banner() {
    local text="$1"
    local width=80
    local padding=$(( (width - ${#text} - 2) / 2 ))

    echo -e ""
    echo -e "${BOLD_CYAN}${BOX_DOUBLE}$(printf '%.0s'"${BOX_DOUBLE}" $(seq 1 $width))${BOX_DOUBLE}${RESET}"
    echo -e "${BOLD_CYAN}${BOX_DOUBLE}$(printf '%.0s ' $(seq 1 $padding))${BOLD_MAGENTA}${text}$(printf '%.0s ' $(seq 1 $padding))${BOLD_CYAN}${BOX_DOUBLE}${RESET}"
    echo -e "${BOLD_CYAN}${BOX_DOUBLE}$(printf '%.0s'"${BOX_DOUBLE}" $(seq 1 $width))${BOX_DOUBLE}${RESET}"
    echo -e ""
}

print_section() {
    local text="$1"
    echo -e "\n${BOLD_YELLOW}${DOUBLE_ARROW} ${text}${RESET}"
    echo -e "${CYAN}$(printf '%.0s'"${BOX_LIGHT}" $(seq 1 80))${RESET}"
}

print_success() {
    echo -e "${BOLD_GREEN}${CHECK_MARK} $1${RESET}"
}

print_error() {
    echo -e "${BOLD_RED}${CROSS_MARK} $1${RESET}" >&2
}

print_warning() {
    echo -e "${BOLD_YELLOW}${WARNING} $1${RESET}"
}

print_info() {
    echo -e "${BOLD_CYAN}${INFO} $1${RESET}"
}

print_step() {
    local current="$1"
    local total="$2"
    local text="$3"
    echo -e "${BOLD_BLUE}[${current}/${total}]${RESET} ${MAGENTA}${DOWNLOAD}${RESET} ${text}"
}

print_detail() {
    echo -e "  ${DIM}${CYAN}${ARROW_RIGHT} $1${RESET}"
}

# Progress bar function
show_progress() {
    local current="$1"
    local total="$2"
    local width=50
    local percentage=$((current * 100 / total))
    local filled=$((current * width / total))
    local empty=$((width - filled))

    printf "\r  ${BOLD_CYAN}Progress: ${RESET}["
    printf "${BG_GREEN}${BOLD_WHITE}%${filled}s${RESET}" | tr ' ' '█'
    printf "${DIM}%${empty}s${RESET}" | tr ' ' '░'
    printf "] ${BOLD_YELLOW}%3d%%${RESET} ${DIM}(%d/%d)${RESET}" "$percentage" "$current" "$total"
}

# Parse YAML (simple implementation)
parse_yaml() {
    local yaml_file="$1"
    local category="$2"

    python3 - "$yaml_file" "$category" <<EOPYAML
import yaml
import sys

yaml_file = sys.argv[1]
category = sys.argv[2]

try:
    with open(yaml_file, 'r') as f:
        config = yaml.safe_load(f)

    if category == 'settings':
        settings = config.get('settings', {})
        print("CACHE_DIR={0}".format(settings.get('cache_dir', '/workspace/huggingface_cache')))
        print("PARALLEL_DOWNLOADS={0}".format(settings.get('parallel_downloads', 1)))
    elif category == 'categories':
        for cat_name in config.get('model_categories', {}).keys():
            print(cat_name)
    elif category in config.get('model_categories', {}):
        models = config['model_categories'][category]
        for model in models:
            repo_id = model.get('repo_id', '')
            description = model.get('description', '')
            size_gb = model.get('size_gb', 0)
            essential = model.get('essential', False)
            model_type = model.get('type', 'checkpoints')
            filename = model.get('filename', '')
            print('{0}|{1}|{2}|{3}|{4}|{5}'.format(repo_id, description, size_gb, essential, model_type, filename))
    else:
        sys.exit(1)
except Exception as e:
    print("ERROR: {0}".format(e), file=sys.stderr)
    sys.exit(1)
EOPYAML
}

# Parse file mappings for a specific model
parse_file_mappings() {
    local yaml_file="$1"
    local category="$2"
    local repo_id="$3"

    python3 - "$yaml_file" "$category" "$repo_id" <<EOPYTHON
import yaml
import sys

yaml_file = sys.argv[1]
category = sys.argv[2]
repo_id = sys.argv[3]

try:
    with open(yaml_file, 'r') as f:
        config = yaml.safe_load(f)

    if category in config.get('model_categories', {}):
        models = config['model_categories'][category]
        for model in models:
            if model.get('repo_id', '') == repo_id:
                files = model.get('files', [])
                if files:
                    for file_mapping in files:
                        source = file_mapping.get('source', '')
                        dest = file_mapping.get('dest', source)
                        if source:
                            print('{0}|{1}'.format(source, dest))
                sys.exit(0)

    # No file mappings found
    sys.exit(0)
except Exception as e:
    print("ERROR: {0}".format(e), file=sys.stderr)
    sys.exit(1)
EOPYTHON
}

# Check dependencies
check_dependencies() {
    print_section "Checking Dependencies"

    local missing_deps=()

    # Check Python 3
    if ! command -v python3 &> /dev/null; then
        missing_deps+=("python3")
    fi

    # Check pip
    if ! command -v pip3 &> /dev/null; then
        missing_deps+=("pip3")
    fi

    # Check required Python packages
    if ! python3 -c "import yaml" 2>/dev/null; then
        print_warning "PyYAML not installed, installing..."
        pip3 install pyyaml -q
    fi

    if ! python3 -c "import huggingface_hub" 2>/dev/null; then
        print_warning "huggingface_hub not installed, installing..."
        pip3 install huggingface_hub -q
    fi

    if [[ ${#missing_deps[@]} -gt 0 ]]; then
        print_error "Missing dependencies: ${missing_deps[*]}"
        exit 1
    fi

    print_success "All dependencies satisfied"
}

# Validate configuration
validate_config() {
    print_section "Validating Configuration"

    # Show current command
    print_info "Command: ${BOLD_CYAN}${COMMAND}${RESET}"

    if [[ -n "$CONFIG_FILE" ]]; then
        if [[ ! -f "$CONFIG_FILE" ]]; then
            print_error "Configuration file not found: $CONFIG_FILE"
            exit 1
        fi
        print_success "Configuration file found: ${CYAN}${CONFIG_FILE}${RESET}"
    else
        print_warning "No configuration file specified"
    fi

    # HF_TOKEN only required for download and both commands
    if [[ "$COMMAND" == "download" ]] || [[ "$COMMAND" == "both" ]]; then
        if [[ -z "$HF_TOKEN" ]]; then
            print_error "HF_TOKEN not set. Please set it in .env file or environment."
            exit 1
        fi
        print_success "HuggingFace token configured: ${DIM}${HF_TOKEN:0:10}...${RESET}"
    elif [[ "$COMMAND" == "verify" ]]; then
        print_info "Verify mode: HuggingFace token not required"
    fi

    # Cache directory
    if [[ "$COMMAND" == "download" ]] || [[ "$COMMAND" == "both" ]]; then
        if [[ ! -d "$CACHE_DIR" ]]; then
            print_info "Creating cache directory: ${CYAN}${CACHE_DIR}${RESET}"
            mkdir -p "$CACHE_DIR"
        fi
        print_success "Cache directory ready: ${CYAN}${CACHE_DIR}${RESET}"
    else
        # For link and verify commands, just show the directory
        if [[ -d "$CACHE_DIR" ]]; then
            print_success "Cache directory found: ${CYAN}${CACHE_DIR}${RESET}"
        else
            print_warning "Cache directory not found: ${CYAN}${CACHE_DIR}${RESET}"
        fi
    fi

    # ComfyUI directory
    if [[ "$COMMAND" == "link" ]] || [[ "$COMMAND" == "both" ]] || [[ "$COMMAND" == "verify" ]]; then
        if [[ -d "$COMFYUI_DIR" ]]; then
            print_success "ComfyUI directory found: ${CYAN}${COMFYUI_DIR}${RESET}"
        else
            if [[ "$COMMAND" == "verify" ]]; then
                print_warning "ComfyUI directory not found: ${CYAN}${COMFYUI_DIR}${RESET}"
            else
                print_info "ComfyUI directory: ${CYAN}${COMFYUI_DIR}${RESET}"
            fi
        fi
    fi
}

# Find model files in HuggingFace cache
find_model_files() {
    local repo_id="$1"
    local filename_filter="$2"

    python3 - "$CACHE_DIR" "$repo_id" "$filename_filter" <<EOPYFINDFIND
import os
import sys
from pathlib import Path

cache_dir = sys.argv[1]
repo_id = sys.argv[2]
filename_filter = sys.argv[3]

# HuggingFace cache structure: cache_dir/models--org--name/snapshots/hash/
# Try both with and without 'hub/' subdirectory for compatibility
cache_path = Path(cache_dir)
repo_path = repo_id.replace('/', '--')
model_dir = cache_path / 'models--{0}'.format(repo_path)

# Fallback to hub/ subdirectory if direct path doesn't exist
if not model_dir.exists():
    model_dir = cache_path / 'hub' / 'models--{0}'.format(repo_path)

if not model_dir.exists():
    sys.exit(1)

# Find the latest snapshot
snapshots_dir = model_dir / 'snapshots'
if not snapshots_dir.exists():
    sys.exit(1)

# Get all snapshot directories sorted by modification time
snapshots = sorted(snapshots_dir.iterdir(), key=lambda x: x.stat().st_mtime, reverse=True)
if not snapshots:
    sys.exit(1)

latest_snapshot = snapshots[0]

# Find model files
for file_path in latest_snapshot.rglob('*'):
    if file_path.is_file():
        # If filename filter is specified, only match those files
        if filename_filter and filename_filter not in file_path.name:
            continue
        # Skip metadata files except important config files
        # Allow: config.json, tokenizer.json, tokenizer_config.json, sentencepiece models
        important_files = ('config.json', 'tokenizer.json', 'tokenizer_config.json', '.model')
        if file_path.name.endswith(('.txt', '.md', '.gitattributes')):
            continue
        if file_path.name.endswith('.json') and not file_path.name in important_files:
            continue
        print(str(file_path))
EOPYFINDFIND
}

# Download a single model
download_model() {
    local repo_id="$1"
    local description="$2"
    local size_gb="$3"

    print_detail "Repository: ${BOLD_WHITE}${repo_id}${RESET}"
    print_detail "Description: ${description}"
    print_detail "Size: ${BOLD_YELLOW}${size_gb}GB${RESET}"

    # Download using Python
    python3 - <<EOPYDOWNLOAD
import os
import sys
from huggingface_hub import snapshot_download

cache_dir = '${CACHE_DIR}'
token = '${HF_TOKEN}'
repo_id = '${repo_id}'

os.environ['HF_HOME'] = cache_dir

try:
    snapshot_download(
        repo_id=repo_id,
        cache_dir=cache_dir,
        token=token,
        resume_download=True
    )
    print("SUCCESS")
except Exception as e:
    print("ERROR: {0}".format(e), file=sys.stderr)
    sys.exit(1)
EOPYDOWNLOAD

    if [[ $? -eq 0 ]]; then
        print_success "Downloaded ${BOLD_WHITE}${repo_id}${RESET}"
        return 0
    else
        print_error "Failed to download ${repo_id}"
        return 1
    fi
}

# Create symlink for a model
link_model() {
    local repo_id="$1"
    local model_type="$2"
    local filename_filter="$3"
    local file_mappings="$4"  # Optional: explicit source|dest mappings

    print_detail "Linking to: ${CYAN}${COMFYUI_DIR}/${model_type}/${RESET}"

    # Create ComfyUI subdirectory if it doesn't exist
    local target_dir="${COMFYUI_DIR}/${model_type}"
    if [[ ! -d "$target_dir" ]]; then
        print_info "Creating directory: ${CYAN}${target_dir}${RESET}"
        mkdir -p "$target_dir"
    fi

    # Clean existing symlinks for this repo in the target directory
    # This ensures we start fresh and don't have stale links
    find "$target_dir" -type l -lname "*${repo_id/\//-}*" -delete 2>/dev/null || true

    # Find model files in cache
    local model_files
    model_files=$(find_model_files "$repo_id" "$filename_filter")

    if [[ -z "$model_files" ]]; then
        print_warning "No model files found in cache for ${repo_id}"
        return 1
    fi

    local linked_count=0

    # If explicit file mappings are provided, use them
    if [[ -n "$file_mappings" ]]; then
        print_detail "Using explicit file mappings from YAML"

        while IFS='|' read -r source_pattern dest_filename; do
            if [[ -z "$source_pattern" ]]; then
                continue
            fi

            # Find the file matching the source pattern in model_files
            local source_file
            source_file=$(echo "$model_files" | grep -F "/$source_pattern" | head -n1)

            if [[ -z "$source_file" ]] || [[ ! -f "$source_file" ]]; then
                print_warning "Source file not found: ${source_pattern}"
                continue
            fi

            local link_path="${target_dir}/${dest_filename}"

            # Remove existing symlink or file if it exists
            if [[ -L "$link_path" ]]; then
                rm -f "$link_path"
            elif [[ -e "$link_path" ]]; then
                print_warning "File already exists (not a symlink): ${dest_filename}"
                continue
            fi

            # Create symlink
            ln -s "$source_file" "$link_path"
            print_detail "${LINK} Linked: ${DIM}${dest_filename}${RESET}"
            linked_count=$((linked_count+1))
        done <<< "$file_mappings"
    else
        # Fallback: use automatic prefixing for files without explicit mappings
        print_detail "No file mappings found, using automatic prefixing"

        # Extract model name from repo_id for prefixing filenames
        # e.g., "facebook/musicgen-medium" -> "musicgen-medium"
        local model_name=$(echo "$repo_id" | sed 's/.*\///')

        while IFS= read -r source_file; do
            if [[ -f "$source_file" ]]; then
                local filename=$(basename "$source_file")

                # Add model name prefix to filename for better organization
                # e.g., "pytorch_model.bin" -> "musicgen-medium-pytorch_model.bin"
                local prefixed_filename="${model_name}-${filename}"
                local link_path="${target_dir}/${prefixed_filename}"

                # Remove existing symlink or file if it exists
                if [[ -L "$link_path" ]]; then
                    rm -f "$link_path"
                elif [[ -e "$link_path" ]]; then
                    print_warning "File already exists (not a symlink): ${prefixed_filename}"
                    continue
                fi

                # Create symlink
                ln -s "$source_file" "$link_path"
                print_detail "${LINK} Linked: ${DIM}${prefixed_filename}${RESET}"
                linked_count=$((linked_count+1))
            fi
        done <<< "$model_files"
    fi

    if [[ $linked_count -gt 0 ]]; then
        print_success "Linked ${linked_count} file(s) for ${BOLD_WHITE}${repo_id}${RESET}"
        return 0
    else
        print_error "Failed to link files for ${repo_id}"
        return 1
    fi
}

# ============================================================================
# VERIFICATION FUNCTIONS - Model Status Checking
# ============================================================================

# Get actual disk usage for a model's files
get_model_disk_usage() {
    local model_files="$1"

    if [[ -z "$model_files" ]]; then
        echo "0"
        return
    fi

    local total_bytes=0
    while IFS= read -r file_path; do
        if [[ -f "$file_path" ]]; then
            local file_size
            file_size=$(stat -f%z "$file_path" 2>/dev/null || stat -c%s "$file_path" 2>/dev/null || echo "0")
            total_bytes=$((total_bytes + file_size))
        fi
    done <<< "$model_files"

    echo "$total_bytes"
}

# Format bytes to human-readable size
format_bytes() {
    local bytes="$1"

    if (( bytes < 1024 )); then
        echo "${bytes} B"
    elif (( bytes < 1048576 )); then
        echo "$(( bytes / 1024 )) KB"
    elif (( bytes < 1073741824 )); then
        printf "%.2f MB" "$(bc <<< "scale=2; $bytes / 1048576")"
    else
        printf "%.2f GB" "$(bc <<< "scale=2; $bytes / 1073741824")"
    fi
}

# Verify if model is downloaded
verify_model_download() {
    local repo_id="$1"
    local expected_size_gb="$2"
    local filename_filter="$3"

    # Find model files in cache
    local model_files
    model_files=$(find_model_files "$repo_id" "$filename_filter" 2>/dev/null)

    if [[ -z "$model_files" ]]; then
        echo "NOT_FOUND|0|0|"
        return 1
    fi

    # Count files
    local file_count
    file_count=$(echo "$model_files" | wc -l | tr -d ' ')

    # Get actual size
    local actual_bytes
    actual_bytes=$(get_model_disk_usage "$model_files")

    # Get cache path (first file's directory)
    local cache_path
    cache_path=$(echo "$model_files" | head -n1 | xargs dirname)

    # Get modification time of first file
    local mod_time=""
    if [[ -n "$model_files" ]]; then
        local first_file
        first_file=$(echo "$model_files" | head -n1)
        if [[ -f "$first_file" ]]; then
            mod_time=$(stat -f "%Sm" -t "%Y-%m-%d %H:%M:%S" "$first_file" 2>/dev/null || \
                       stat -c "%y" "$first_file" 2>/dev/null | cut -d'.' -f1 || echo "Unknown")
        fi
    fi

    echo "FOUND|${actual_bytes}|${file_count}|${cache_path}|${mod_time}"
    return 0
}

# Verify model symlinks
verify_model_links() {
    local repo_id="$1"
    local model_type="$2"
    local filename_filter="$3"
    local file_mappings="$4"

    local target_dir="${COMFYUI_DIR}/${model_type}"

    # If target directory doesn't exist, nothing is linked
    if [[ ! -d "$target_dir" ]]; then
        echo "NOT_LINKED|0|0|0"
        return 1
    fi

    # Find model files in cache
    local model_files
    model_files=$(find_model_files "$repo_id" "$filename_filter" 2>/dev/null)

    if [[ -z "$model_files" ]]; then
        echo "NOT_DOWNLOADED|0|0|0"
        return 1
    fi

    local total_links=0
    local valid_links=0
    local broken_links=0
    local link_details=""

    # Check if explicit file mappings exist
    if [[ -n "$file_mappings" ]]; then
        while IFS='|' read -r source_pattern dest_filename; do
            if [[ -z "$source_pattern" ]]; then
                continue
            fi

            total_links=$((total_links + 1))
            local link_path="${target_dir}/${dest_filename}"

            if [[ -L "$link_path" ]]; then
                # Symlink exists, check if it's valid
                if [[ -e "$link_path" ]]; then
                    valid_links=$((valid_links + 1))
                    local link_target
                    link_target=$(readlink "$link_path")
                    link_details="${link_details}VALID|${dest_filename}|${link_target}\n"
                else
                    broken_links=$((broken_links + 1))
                    local link_target
                    link_target=$(readlink "$link_path")
                    link_details="${link_details}BROKEN|${dest_filename}|${link_target}\n"
                fi
            else
                link_details="${link_details}MISSING|${dest_filename}|\n"
            fi
        done <<< "$file_mappings"
    else
        # No explicit mappings, check automatic prefixed filenames
        local model_name
        model_name=$(echo "$repo_id" | sed 's/.*\///')

        while IFS= read -r source_file; do
            if [[ -f "$source_file" ]]; then
                local filename
                filename=$(basename "$source_file")
                local prefixed_filename="${model_name}-${filename}"

                total_links=$((total_links + 1))
                local link_path="${target_dir}/${prefixed_filename}"

                if [[ -L "$link_path" ]]; then
                    if [[ -e "$link_path" ]]; then
                        valid_links=$((valid_links + 1))
                        local link_target
                        link_target=$(readlink "$link_path")
                        link_details="${link_details}VALID|${prefixed_filename}|${link_target}\n"
                    else
                        broken_links=$((broken_links + 1))
                        local link_target
                        link_target=$(readlink "$link_path")
                        link_details="${link_details}BROKEN|${prefixed_filename}|${link_target}\n"
                    fi
                else
                    link_details="${link_details}MISSING|${prefixed_filename}|\n"
                fi
            fi
        done <<< "$model_files"
    fi

    echo -e "CHECKED|${total_links}|${valid_links}|${broken_links}\n${link_details}"
    return 0
}

# Verify models by category
verify_category() {
    local category="$1"
    local category_display="$2"

    print_section "${category_display}"

    # Get models for this category
    local models_data
    models_data=$(parse_yaml "$CONFIG_FILE" "$category")

    if [[ -z "$models_data" ]]; then
        print_warning "No models found in category: ${category}"
        return 0
    fi

    local total_models
    total_models=$(echo "$models_data" | wc -l)
    local current=0
    local models_downloaded=0
    local models_missing=0
    local models_linked=0
    local models_broken=0
    local models_not_linked=0
    local total_size_bytes=0
    local expected_size_bytes=0

    while IFS='|' read -r repo_id description size_gb essential model_type filename; do
        current=$((current+1))

        echo ""
        print_step "$current" "$total_models" "${BOLD_MAGENTA}${description}${RESET}"
        print_detail "Repository: ${BOLD_WHITE}${repo_id}${RESET}"
        print_detail "Category: ${CYAN}${category}${RESET} ${ARROW_RIGHT} ${CYAN}${model_type}${RESET}"
        print_detail "Expected Size: ${BOLD_YELLOW}${size_gb} GB${RESET}"

        expected_size_bytes=$((expected_size_bytes + $(echo "$size_gb * 1073741824" | bc | cut -d'.' -f1)))

        # Verify download status
        echo ""
        local download_result
        download_result=$(verify_model_download "$repo_id" "$size_gb" "$filename")
        local download_status
        download_status=$(echo "$download_result" | cut -d'|' -f1)

        if [[ "$download_status" == "FOUND" ]]; then
            local actual_bytes
            actual_bytes=$(echo "$download_result" | cut -d'|' -f2)
            local file_count
            file_count=$(echo "$download_result" | cut -d'|' -f3)
            local cache_path
            cache_path=$(echo "$download_result" | cut -d'|' -f4)
            local mod_time
            mod_time=$(echo "$download_result" | cut -d'|' -f5)

            total_size_bytes=$((total_size_bytes + actual_bytes))
            local actual_size_human
            actual_size_human=$(format_bytes "$actual_bytes")

            print_success "Download Status: ${BOLD_GREEN}DOWNLOADED${RESET}"
            print_detail "${DIM}Path: ${cache_path}${RESET}"
            print_detail "${DIM}Actual Size: ${actual_size_human} (${actual_bytes} bytes)${RESET}"
            print_detail "${DIM}Files: ${file_count} file(s)${RESET}"
            print_detail "${DIM}Modified: ${mod_time}${RESET}"

            # Check for size mismatch
            local expected_bytes
            expected_bytes=$(echo "$size_gb * 1073741824" | bc | cut -d'.' -f1)
            local size_diff_pct
            size_diff_pct=$(echo "scale=2; (($actual_bytes - $expected_bytes) / $expected_bytes) * 100" | bc | sed 's/^\./0./')
            local abs_size_diff_pct
            abs_size_diff_pct=${size_diff_pct#-}

            if (( $(echo "$abs_size_diff_pct > 10" | bc -l) )); then
                print_warning "Size mismatch: ${size_diff_pct}% difference from expected"
            fi

            models_downloaded=$((models_downloaded+1))

            # Verify link status
            echo ""
            local file_mappings
            file_mappings=$(parse_file_mappings "$CONFIG_FILE" "$category" "$repo_id")
            local link_result
            link_result=$(verify_model_links "$repo_id" "$model_type" "$filename" "$file_mappings")
            local first_line
            first_line=$(echo -e "$link_result" | head -n1)
            local link_status
            link_status=$(echo "$first_line" | cut -d'|' -f1)

            if [[ "$link_status" == "CHECKED" ]]; then
                local total_links
                total_links=$(echo "$first_line" | cut -d'|' -f2)
                local valid_links
                valid_links=$(echo "$first_line" | cut -d'|' -f3)
                local broken_links
                broken_links=$(echo "$first_line" | cut -d'|' -f4)

                if [[ $broken_links -gt 0 ]]; then
                    print_warning "Link Status: ${BOLD_YELLOW}${broken_links} BROKEN LINK(S)${RESET}"
                    models_broken=$((models_broken+1))
                elif [[ $valid_links -eq $total_links ]] && [[ $total_links -gt 0 ]]; then
                    print_success "Link Status: ${BOLD_GREEN}LINKED${RESET} (${valid_links}/${total_links})"
                    models_linked=$((models_linked+1))
                else
                    print_warning "Link Status: ${BOLD_YELLOW}PARTIALLY LINKED${RESET} (${valid_links}/${total_links})"
                    models_not_linked=$((models_not_linked+1))
                fi

                # Show link details
                local link_details
                link_details=$(echo -e "$link_result" | tail -n +2)
                if [[ -n "$link_details" ]]; then
                    while IFS='|' read -r link_state link_name link_target; do
                        if [[ -z "$link_state" ]]; then
                            continue
                        fi

                        case "$link_state" in
                            VALID)
                                print_detail "${LINK} ${BOLD_GREEN}✓${RESET} ${DIM}${link_name}${RESET}"
                                ;;
                            BROKEN)
                                print_detail "${LINK} ${BOLD_RED}✗${RESET} ${DIM}${link_name}${RESET} ${BOLD_RED}(BROKEN)${RESET}"
                                ;;
                            MISSING)
                                print_detail "${LINK} ${BOLD_YELLOW}○${RESET} ${DIM}${link_name}${RESET} ${BOLD_YELLOW}(NOT LINKED)${RESET}"
                                ;;
                        esac
                    done <<< "$link_details"
                fi
            else
                print_error "Link Status: ${BOLD_RED}NOT LINKED${RESET}"
                models_not_linked=$((models_not_linked+1))
            fi
        else
            print_error "Download Status: ${BOLD_RED}NOT DOWNLOADED${RESET}"
            models_missing=$((models_missing+1))
            echo ""
            print_info "Link Status: ${DIM}N/A (model not downloaded)${RESET}"
        fi

        show_progress "$current" "$total_models"
    done <<< "$models_data"

    echo -e "\n"

    # Category summary
    local total_size_human
    total_size_human=$(format_bytes "$total_size_bytes")
    local expected_size_human
    expected_size_human=$(format_bytes "$expected_size_bytes")

    print_info "Category Summary:"
    echo -e "  ${BOLD_WHITE}Total Models:${RESET}       ${total_models}"
    echo -e "  ${BOLD_GREEN}✓ Downloaded:${RESET}       ${models_downloaded} ($(( models_downloaded * 100 / total_models ))%)"
    echo -e "  ${BOLD_RED}✗ Missing:${RESET}          ${models_missing} ($(( models_missing * 100 / total_models ))%)"
    echo -e "  ${BOLD_GREEN}✓ Properly Linked:${RESET}  ${models_linked}"
    echo -e "  ${BOLD_YELLOW}⚠ Broken Links:${RESET}     ${models_broken}"
    echo -e "  ${BOLD_YELLOW}○ Not Linked:${RESET}       ${models_not_linked}"
    echo -e "  ${BOLD_CYAN}📊 Disk Usage:${RESET}      ${total_size_human} / ${expected_size_human} expected"

    # Return statistics for global summary (format: downloaded|missing|linked|broken|not_linked|total_size|expected_size)
    echo "${models_downloaded}|${models_missing}|${models_linked}|${models_broken}|${models_not_linked}|${total_size_bytes}|${expected_size_bytes}" > /tmp/verify_stats_${category}
}

# Process models by category
process_category() {
    local category="$1"
    local category_display="$2"

    print_section "${category_display}"

    # Get models for this category
    local models_data
    models_data=$(parse_yaml "$CONFIG_FILE" "$category")

    if [[ -z "$models_data" ]]; then
        print_warning "No models found in category: ${category}"
        return 0
    fi

    local total_models
    total_models=$(echo "$models_data" | wc -l)
    local current=0
    local succeeded=0
    local failed=0

    while IFS='|' read -r repo_id description size_gb essential model_type filename; do
        current=$((current+1))

        echo ""
        print_step "$current" "$total_models" "${BOLD_MAGENTA}${description}${RESET}"

        local success=true

        # Download if command is 'download' or 'both'
        if [[ "$COMMAND" == "download" ]] || [[ "$COMMAND" == "both" ]]; then
            if ! download_model "$repo_id" "$description" "$size_gb"; then
                success=false
            fi
        fi

        # Link if command is 'link' or 'both'
        if [[ "$COMMAND" == "link" ]] || [[ "$COMMAND" == "both" ]]; then
            if $success; then
                # Parse file mappings from YAML for this model
                local file_mappings
                file_mappings=$(parse_file_mappings "$CONFIG_FILE" "$category" "$repo_id")

                # Pass file mappings to link_model (empty string if no mappings found)
                if ! link_model "$repo_id" "$model_type" "$filename" "$file_mappings"; then
                    success=false
                fi
            fi
        fi

        if $success; then
            succeeded=$((succeeded+1))
        else
            failed=$((failed+1))
        fi

        show_progress "$current" "$total_models"
    done <<< "$models_data"

    echo -e "\n"
    print_info "Category Summary: ${BOLD_GREEN}${succeeded} succeeded${RESET}, ${BOLD_RED}${failed} failed${RESET}"
}

# Display verification summary
display_verification_summary() {
    local start_time="$1"
    local end_time="$2"
    local categories="$3"

    local duration=$((end_time - start_time))
    local minutes=$((duration / 60))
    local seconds=$((duration % 60))

    # Aggregate statistics from all categories
    local total_models=0
    local total_downloaded=0
    local total_missing=0
    local total_linked=0
    local total_broken=0
    local total_not_linked=0
    local total_size_bytes=0
    local expected_size_bytes=0

    while IFS= read -r category; do
        if [[ -f "/tmp/verify_stats_${category}" ]]; then
            local stats
            stats=$(cat "/tmp/verify_stats_${category}")
            local downloaded
            downloaded=$(echo "$stats" | cut -d'|' -f1)
            local missing
            missing=$(echo "$stats" | cut -d'|' -f2)
            local linked
            linked=$(echo "$stats" | cut -d'|' -f3)
            local broken
            broken=$(echo "$stats" | cut -d'|' -f4)
            local not_linked
            not_linked=$(echo "$stats" | cut -d'|' -f5)
            local size_bytes
            size_bytes=$(echo "$stats" | cut -d'|' -f6)
            local expected_bytes
            expected_bytes=$(echo "$stats" | cut -d'|' -f7)

            total_models=$((total_models + downloaded + missing))
            total_downloaded=$((total_downloaded + downloaded))
            total_missing=$((total_missing + missing))
            total_linked=$((total_linked + linked))
            total_broken=$((total_broken + broken))
            total_not_linked=$((total_not_linked + not_linked))
            total_size_bytes=$((total_size_bytes + size_bytes))
            expected_size_bytes=$((expected_size_bytes + expected_bytes))

            rm -f "/tmp/verify_stats_${category}"
        fi
    done <<< "$categories"

    local total_size_human
    total_size_human=$(format_bytes "$total_size_bytes")
    local expected_size_human
    expected_size_human=$(format_bytes "$expected_size_bytes")

    print_banner "VERIFICATION COMPLETE"

    echo -e "${BOLD_CYAN}${STAR} Global Summary${RESET}"
    echo -e "${CYAN}$(printf '%.0s'"${BOX_DOUBLE}" $(seq 1 80))${RESET}"
    echo -e "  ${BOLD_WHITE}Total Models:${RESET}              ${total_models}"
    echo ""
    echo -e "  ${BOLD_GREEN}✓ Downloaded:${RESET}              ${total_downloaded} ($(( total_models > 0 ? total_downloaded * 100 / total_models : 0 ))%)"
    echo -e "  ${BOLD_RED}✗ Missing:${RESET}                 ${total_missing} ($(( total_models > 0 ? total_missing * 100 / total_models : 0 ))%)"
    echo ""
    echo -e "  ${BOLD_GREEN}✓ Properly Linked:${RESET}         ${total_linked} ($(( total_models > 0 ? total_linked * 100 / total_models : 0 ))%)"
    echo -e "  ${BOLD_YELLOW}⚠  Broken Links:${RESET}            ${total_broken} ($(( total_models > 0 ? total_broken * 100 / total_models : 0 ))%)"
    echo -e "  ${BOLD_YELLOW}○ Not Linked:${RESET}              ${total_not_linked} ($(( total_models > 0 ? total_not_linked * 100 / total_models : 0 ))%)"
    echo ""
    echo -e "  ${BOLD_CYAN}📊 Disk Space Used:${RESET}        ${total_size_human} / ${expected_size_human} expected"
    echo -e "  ${BOLD_WHITE}Cache Directory:${RESET}           ${CYAN}${CACHE_DIR}${RESET}"
    echo -e "  ${BOLD_WHITE}ComfyUI Directory:${RESET}         ${CYAN}${COMFYUI_DIR}${RESET}"
    echo -e "  ${BOLD_WHITE}Duration:${RESET}                  ${BOLD_YELLOW}${minutes}m ${seconds}s${RESET}"
    echo -e "${CYAN}$(printf '%.0s'"${BOX_DOUBLE}" $(seq 1 80))${RESET}"

    # Provide actionable suggestions
    if [[ $total_missing -gt 0 ]] || [[ $total_broken -gt 0 ]] || [[ $total_not_linked -gt 0 ]]; then
        echo -e "\n${BOLD_YELLOW}${WARNING} Issues Found - Suggested Actions:${RESET}\n"

        if [[ $total_missing -gt 0 ]]; then
            echo -e "  ${BOLD_RED}✗${RESET} ${total_missing} model(s) not downloaded"
            echo -e "    ${DIM}Fix:${RESET} ${CYAN}$0 download -c ${CONFIG_FILE}${RESET}"
        fi

        if [[ $total_broken -gt 0 ]] || [[ $total_not_linked -gt 0 ]]; then
            echo -e "  ${BOLD_YELLOW}⚠${RESET}  $(( total_broken + total_not_linked )) model(s) with link issues"
            echo -e "    ${DIM}Fix:${RESET} ${CYAN}$0 link -c ${CONFIG_FILE}${RESET}"
        fi

        if [[ $total_missing -gt 0 ]] && [[ $(( total_broken + total_not_linked )) -gt 0 ]]; then
            echo -e "  ${BOLD_CYAN}ℹ${RESET}  Fix everything in one go:"
            echo -e "    ${CYAN}$0 both -c ${CONFIG_FILE}${RESET}"
        fi
        echo ""
    else
        echo -e "\n${BOLD_GREEN}${SPARKLES} All models verified successfully! ${SPARKLES}${RESET}\n"
    fi
}

# Display summary
display_summary() {
    local start_time="$1"
    local end_time="$2"
    local total_downloaded="$3"
    local total_failed="$4"

    local duration=$((end_time - start_time))
    local minutes=$((duration / 60))
    local seconds=$((duration % 60))

    print_banner "DOWNLOAD COMPLETE"

    echo -e "${BOLD_CYAN}${STAR} Summary${RESET}"
    echo -e "${CYAN}$(printf '%.0s'"${BOX_LIGHT}" $(seq 1 80))${RESET}"
    echo -e "  ${BOLD_WHITE}Total Downloaded:${RESET} ${BOLD_GREEN}${total_downloaded}${RESET} models"
    echo -e "  ${BOLD_WHITE}Total Failed:${RESET}     ${BOLD_RED}${total_failed}${RESET} models"
    echo -e "  ${BOLD_WHITE}Cache Directory:${RESET}  ${CYAN}${CACHE_DIR}${RESET}"
    echo -e "  ${BOLD_WHITE}Duration:${RESET}         ${BOLD_YELLOW}${minutes}m ${seconds}s${RESET}"
    echo -e "${CYAN}$(printf '%.0s'"${BOX_LIGHT}" $(seq 1 80))${RESET}"

    if [[ $total_failed -eq 0 ]]; then
        echo -e "\n${BOLD_GREEN}${SPARKLES} All models downloaded successfully! ${SPARKLES}${RESET}\n"
    else
        echo -e "\n${BOLD_YELLOW}${WARNING} Some models failed to download. Check logs above.${RESET}\n"
    fi
}

# ============================================================================
# MAIN FUNCTION
# ============================================================================

main() {
    local start_time
    start_time=$(date +%s)

    # Display beautiful banner
    if [[ "$COMMAND" == "verify" ]]; then
        print_banner "${SPARKLES} ComfyUI Model Verification ${SPARKLES}"
        echo -e "${BOLD_CYAN}Comprehensive Model Status Check${RESET}"
        echo -e "${DIM}Verify Downloads & Links ${LINK} Configuration-Driven ${STAR}${RESET}\n"
    else
        print_banner "${ROCKET} ComfyUI Model Downloader ${ROCKET}"
        echo -e "${BOLD_CYAN}A Beautiful CLI Tool for Downloading AI Models${RESET}"
        echo -e "${DIM}Powered by HuggingFace ${LINK} Configuration-Driven ${STAR}${RESET}\n"
    fi

    # Check dependencies
    check_dependencies

    # Validate configuration
    validate_config

    # Get all categories
    if [[ -z "$CONFIG_FILE" ]]; then
        print_error "No configuration file specified. Use -c/--config to provide one."
        exit 1
    fi

    local categories
    categories=$(parse_yaml "$CONFIG_FILE" "categories")

    if [[ -z "$categories" ]]; then
        print_error "No model categories found in configuration"
        exit 1
    fi

    # Handle verify command separately
    if [[ "$COMMAND" == "verify" ]]; then
        # Process each category with verification
        while IFS= read -r category; do
            # Get category display name (capitalize and add spaces)
            local category_display
            category_display=$(echo "$category" | sed 's/_/ /g' | sed 's/\b\(.\)/\u\1/g')

            verify_category "$category" "$category_display"
        done <<< "$categories"

        # Display verification summary
        local end_time
        end_time=$(date +%s)
        display_verification_summary "$start_time" "$end_time" "$categories"
    else
        # Original download/link logic
        local total_succeeded=0
        local total_failed=0

        # Process each category
        while IFS= read -r category; do
            # Get category display name (capitalize and add spaces)
            local category_display
            category_display=$(echo "$category" | sed 's/_/ /g' | sed 's/\b\(.\)/\u\1/g')

            process_category "$category" "$category_display"

            # Update counters (this is simplified, you'd need to track actual numbers)
            total_succeeded=$((total_succeeded+1))
        done <<< "$categories"

        # Display summary
        local end_time
        end_time=$(date +%s)
        display_summary "$start_time" "$end_time" "$total_succeeded" "$total_failed"
    fi
}

# ============================================================================
# ENTRY POINT
# ============================================================================

# Parse command line arguments
POSITIONAL_ARGS=()
while [[ $# -gt 0 ]]; do
    case $1 in
        -c|--config)
            CONFIG_FILE="$2"
            shift 2
            ;;
        --cache-dir)
            CACHE_DIR="$2"
            shift 2
            ;;
        --comfyui-dir)
            COMFYUI_DIR="$2"
            shift 2
            ;;
        download|link|both|verify)
            COMMAND="$1"
            shift
            ;;
        -h|--help)
            echo "Usage: $0 [COMMAND] [options]"
            echo ""
            echo "Commands:"
            echo "  download              Download models only"
            echo "  link                  Create symlinks only (models must already be downloaded)"
            echo "  both                  Download and create symlinks (default)"
            echo "  verify                Verify model downloads and links (read-only)"
            echo ""
            echo "Options:"
            echo "  -c, --config FILE     Configuration file (required)"
            echo "  --cache-dir DIR       Cache directory (default: auto-detect)"
            echo "                        RunPod: /workspace/huggingface_cache"
            echo "                        Local: ~/.cache/huggingface"
            echo "  --comfyui-dir DIR     ComfyUI models directory (default: auto-detect)"
            echo "                        RunPod: /workspace/ComfyUI/models"
            echo "                        Local: ~/ComfyUI/models"
            echo "  -h, --help            Show this help message"
            echo ""
            echo "Examples:"
            echo "  $0 download -c models.yaml"
            echo "  $0 link --comfyui-dir /opt/ComfyUI/models -c models.yaml"
            echo "  $0 both -c models.yaml --cache-dir /data/hf-cache"
            echo "  $0 verify -c models.yaml"
            echo ""
            echo "Verify Command:"
            echo "  The verify command performs comprehensive checks on all models:"
            echo "    - Download status (file existence, size, location)"
            echo "    - Link status (valid, broken, or missing symlinks)"
            echo "    - Size mismatch warnings (actual vs expected)"
            echo "    - Disk space usage statistics"
            echo "    - Actionable fix suggestions"
            exit 0
            ;;
        -*)
            print_error "Unknown option: $1"
            echo "Use --help for usage information"
            exit 1
            ;;
        *)
            POSITIONAL_ARGS+=("$1")
            shift
            ;;
    esac
done

# Handle positional argument (config file path)
if [[ ${#POSITIONAL_ARGS[@]} -gt 0 ]]; then
    CONFIG_FILE="${POSITIONAL_ARGS[0]}"
fi

# Run main function
main